An experimental glider has smashed the record for high-altitude flight.

On Sept. 2, the sleek Perlan 2 glider carried two pilots to 76,100 feet, or more than 14 miles, over the El Calafate region in southern Argentina. That’s the highest altitude ever reached by humans aboard an unpowered fixed-wing aircraft, and one of the highest altitudes reached by an aircraft of any description. Only spy planes and specialized balloons have flown higher.